University Bayreuth, Dept. Animal Ecology I and BayCEER, Universitätsstr. 30, 95440 Bayreuth, Germany.
RSS Remote Sensing Solutions GmbH, Dingolfinger Str. 9, 81673 München, Germany; Ludwig-Maximilians-Universität Munich, GeoBio-Center, Großhadernerstr. 2, 82152 Planegg-Martinsried, Germany.
Mar Pollut Bull. 2019 Dec;149:110515. doi: 10.1016/j.marpolbul.2019.110515. Epub 2019 Aug 26.
Coastal areas are especially prone to plastic debris, being subjected to various land- and sea-based sources. Nevertheless, knowledge about microplastic distribution on beaches is limited, as studies focused either on high tide lines, specific items, or relied on visual identification. Beaches exhibit several accumulation zones and microplastic deposition depends on particle properties. We thus studied microplastic distribution (1-5 mm), including various types and shapes, among three driftlines at three beaches within the Po River Delta. Particles were analyzed using ATR-FTIR spectroscopy. Abundances ranged from 2.92 (± 4.86 SD) to 23.30 (± 45.43 SD) microplastics per kilogram dry weight between the beaches. The accumulation of microplastics among driftlines showed no consistent pattern, besides expanded polystyrene tending to accumulate backshore. We observed that accumulation hotspots within a single driftline can disrupt a general observed accumulation pattern. Thus, microplastic monitoring guidelines should further include protocols for the handling of accumulation hotspots within datasets.
沿海地区特别容易受到塑料碎片的影响，因为它们会受到各种陆地和海洋来源的影响。然而，由于研究要么集中在高潮线、特定物品上，要么依赖于视觉识别，因此海滩上微塑料的分布情况知之甚少。海滩上有几个积沙区，微塑料的沉积取决于颗粒的性质。因此，我们在波河三角洲的三个海滩的三个漂流线上研究了微塑料的分布（1-5 毫米），包括各种类型和形状。使用衰减全反射傅里叶变换红外光谱法对颗粒进行了分析。在海滩之间，每公斤干重的微塑料丰度范围为 2.92（±4.86SD）至 23.30（±45.43SD）。除了膨胀聚苯乙烯倾向于在后滨积累外，漂流线之间的微塑料积累没有呈现出一致的模式。我们观察到，单个漂流线内的积累热点可能会破坏一般观察到的积累模式。因此，微塑料监测指南还应进一步包括处理数据集中积累热点的协议。
